Island



(No Model.)

J. D. HUNTINGTON.

TOOL FOR TURNING AND SHAPING EMERY WHEELS.

No. 897,503. Patented Feb. 12, 1889.

W TN E5555 I NVE NTEIH Uniirnn drains ..-AT ppICiE TOQL FOR TURNING ANDSHAPING EMERY-WHEELS.

SPECIFICATION forming part of Letters Patent No. 397,503, dated.February 12, 1889.

Application filed April 9, 1888.

To all 2071 0111 it may concern.-

Be it known that I, JOSEPH D. HUNTING- TON, a citizen of the Dominion ofCanada, residing at Providence, in the county of Providence and State ofRhode Island, have invented a new and useful Improvement in Tools for Tu rning an d Shapin g E mery-\\' heels and for Similar Purposcs,of whichthe following is a specification.

My invention belongs to that class of tools used for turning and shapingemery-wheels and grindstones of other inaterial,-havin one or morerevolving disks or toothed wheels set in the end of a split or forkedholder. In such tools the disks are of metal, hard and very thin. Thetool is placed upon a firm rest, and the edges of the disks are broughtin contact with the face of the revolving wheel to be cut down orshaped. This causes the disks to revolve, and the cutting is effected bythe impact of the edges of the revolving disks i11- stead of by thefamiliar rigid diamond tool. As these disks are thin, it is desirable togive them m u chla-terz-tl support as possible from the arms in whichthey are mounted; hence they are set so that their edges project butlittle beyond the forward end of the holder, and the degree of openingbetween the prongs must be proportioned to the space required by thedisks. It is still further desirable in providing for this lateralsupport that the inner faces of the supportingarms should be parallelwith the plane of the disks as far back from the forward end of the toolas the disks extend. It is also desirable in spread ing or contractingthe jaws that the holes in which the arbor revolves or takes its bearingshould be kept in line. The holders in which the revolving disks aremounted are at pres ent made with rigid arms designed for a given numberof disks occupying a given space; hence the tool cannot be used foragreater or less number of disks nor for the same number of greater orless thickness.

The objectof my'invention is to render the holder capable ofaccoinmodatingmore or less disks, as occasion may reij uire, byproviding means for (INlillltllllg or contracting the jaws, and alsomeans for preserving the parallelism referred to when the same isdesired. For this purpose I construct the prongs of the holder muchlonger than the diameter of the Serial No. 270,060. (No model.)

i disks, and between the disks and the junction of the prongs I pass ascrew transversely 3 through both arms of the holder. If the holder isconstructed with the maximum opening between the arms, the office of thescrew will be only to draw them nearer together and afterward to allowthem to spring apart by releasing them from the control of the screw tothe desired extent. It obvious that the screw can readily be arranged toboth draw the arms together or spread. them apart. When the degree ofmovement of the arins or prongs is to besuch as to require attention tomaintaining their parallelism in that portion contiguous to the disks,Iinsert another screw between the junction of the prongs and thefirst-mentioned screw and parallel with it. The purpose of this secondscrew is to operate in conjunction with the first to spring the arms andbring the portion beyond the first screw into parallelism.

In the accompanying drawings, illustrative of my invention, Figure l isa top view of my invention. Fig. 2 is a side view of the same, and Fig.3 a forward end View.

H is the handle; A A, the arms or prongs; (7, a disk, and a- (shown indotted lines in Fig. 1) is the arbor on which the disk revolves. Iprefer that the arbor should also be allowed to revolve to diminish thefriction of the disk.

8 is the screw which may serve to draw the arms together, and s thescrew passing through an arm and resting against the inside of theopposite arm to spring the arms apart between the point of theirjunction and the screw .91 c is a cap covering the end of the arbor, andismade concave on the inside. This cap serves the purpose of keeping thegrit out of the bearings of the arbor, and also of holding a little oilfor lubricating the bearing. The arbor may be a straight pin, in whichcase the cap 0 retains it in position.

Z is a lug or guide, of more or less convenience, which reaches beyondthe rest and is held back firmly against it to steady the tool.

It is often desirable to present the disk with a slightly-obliquedirection to the face of the wheel to be shaped. In this position thedisk cuts a path. wider than its thickness. As a convenience for thisuse of the tool I may slightly bevel the under side of the prongs,

IOO

which bears on the rest, tormin g a guide which determines theinclination.

It is apparent that by the use of my 'in 'vention holders of the samepatternv may be adapted to one or several disks or toothed wheels, or acombination of both, and that the number of disks can be changed in thesame holder from time to time, and that in each case the disks can beproperly mounted with the utmost facility. ()ther arrai'igements ot'screws will readily suggest themselves to accomplish the purpose of myinvention. Thus i if two belts or screws were passed transverselythrough both arms, each with the screw-head resting against the outsideof the first arm, and having a collar resting against the inside of thesame arm and threaded only on that portion entering the opposite arm,the parallelism ot' the arms beyond the screw nearest the disk canalways be secured whether it be desired to ad 3' ust converging ordiverging arms.

My invention is adapted to be used by hand, and also to be held in thetool-post of a lathe or other fixture for turning up emery-wheels inplace of diamond tools.

\Vhat I claim,and desire to secure by Letters Patent, is

1. A tool for shaping emery-wheels, consisting of a disk or disks, pronA A, havin g bearings at their front end for the disk or disks, saidprongs being adapted to be adjusted toward the disk to confine the sameagainst lateral movement, an adjusting screw for moving the arms, and asecond screw forcontrolling said movement, whereby the arms may beadjusted to parallelism and in close proximity to the disk situatedbetween them, substantially as described.

2. A tool for shaping emery-wheels, consisting of a disk or disks, and aholder for said disk, consisting of spring-prongs A A, having bearin gsfor the disk and screw for adjusting the spring-prongs to parallelismand proximity to the disk, substantially as described.

3. In combination, the Wheel, the spindle therefor, the prongs A A,having bearingopenings for the spindle, said prongs being movable fromand toward each other, whereby they may be adjusted close to the wheel,and a screw for adjusting the prongs to parallelism and in closeproximity to the disk, substantiall y as described.

JOSEPH I D.. HUNTINGTON.

\Yitnesses:

JOHN W. HOGAN, O. LAPHAM.

